They're following the Microsoft Windows 7 update model. They have two teams of programmers for updates.
One team will fix a, b, c, and d, in the process of which they screw up e, f, g, and h. The other team will fix e, f, g, and h, but screw up i, j, k, and l. Then the first team goes and fixes up i, j, k, and l, but fouls up m, n, o, and p...
Repeat ad infinitum except to re-initiate the alphabet from time to time.
Windows 7 is purfect
Windows 7 are perfect
Winnows 7 is perfect
Windows 7 is prefect
indows 7 is perfect
Indows 7 is perfect
Windos 7 perfect
Windows 7 is perfick
Widows 7 is perfect
And Win 10 is perfect right out of the box... right?